Srinivas Eeda wrote:
> Patch to track delayed orphan scan timer statistics.
>
> Modifies ocfs2_osb_dump to print the following:
> Orphan Scan=> Local: 10 Global: 21 Last Scan: 67 seconds ago
>
> Signed-off-by: Srinivas Eeda <srinivas.e...@oracle.com>
>
Signed-off-by: Sunil Mushran <sunil.mush...@oracle.com>
> ---
> fs/ocfs2/journal.c | 2 ++
> fs/ocfs2/ocfs2.h | 4 +++-
> fs/ocfs2/super.c | 8 ++++++++
> 3 files changed, 13 insertions(+), 1 deletions(-)
>
> diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
> index 63b54b7..6178f6d 100644
> --- a/fs/ocfs2/journal.c
> +++ b/fs/ocfs2/journal.c
> @@ -1899,6 +1899,8 @@ void ocfs2_queue_orphan_scan(struct ocfs2_super *osb)
> * number and update LVB so other node will skip the scan for a while
> */
> seqno++;
> + os->os_count++;
> + os->os_scantime = CURRENT_TIME;
> unlock:
> ocfs2_orphan_scan_unlock(osb, seqno, DLM_LOCK_EX);
> out:
> diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
> index 373fb1c..3355b1a 100644
> --- a/fs/ocfs2/ocfs2.h
> +++ b/fs/ocfs2/ocfs2.h
> @@ -156,7 +156,9 @@ struct ocfs2_orphan_scan {
> struct ocfs2_super *os_osb;
> struct ocfs2_lock_res os_lockres; /* lock to synchronize scans */
> struct delayed_work os_orphan_scan_work;
> - u32 os_seqno; /* incremented on every scan */
> + struct timespec os_scantime; /* time this node ran the scan */
> + u32 os_count; /* tracks node specific scans */
> + u32 os_seqno; /* tracks cluster wide scans */
> };
>
> struct ocfs2_dlm_debug {
> diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
> index 44ac27e..d05f3ca 100644
> --- a/fs/ocfs2/super.c
> +++ b/fs/ocfs2/super.c
> @@ -208,6 +208,7 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char
> *buf, int len)
> int i;
> struct ocfs2_cluster_connection *cconn = osb->cconn;
> struct ocfs2_recovery_map *rm = osb->recovery_map;
> + struct ocfs2_orphan_scan *os;
>
> out += snprintf(buf + out, len - out,
> "%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
> @@ -309,6 +310,13 @@ static int ocfs2_osb_dump(struct ocfs2_super *osb, char
> *buf, int len)
> i, osb->slot_recovery_generations[i]);
> }
>
> + os = &osb->osb_orphan_scan;
> + out += snprintf(buf + out, len - out, "Orphan Scan=> ");
> + out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
> + os->os_count, os->os_seqno);
> + out += snprintf(buf + out, len - out, " Last Scan: %lu seconds ago\n",
> + (get_seconds() - os->os_scantime.tv_sec));
> +
> return out;
> }
>
>
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